From 7995cec90c63380ba05b297d1e196affc371cac9 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Sun, 31 Jul 2016 15:20:22 +0200
Subject: Fix vectorization logic for coeff-based product for some corner
 cases.

---
 Eigen/src/Core/ProductEvaluators.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'Eigen/src/Core/ProductEvaluators.h')

diff --git a/Eigen/src/Core/ProductEvaluators.h b/Eigen/src/Core/ProductEvaluators.h
index d739c5156..955668bef 100644
--- a/Eigen/src/Core/ProductEvaluators.h
+++ b/Eigen/src/Core/ProductEvaluators.h
@@ -489,8 +489,8 @@ struct product_evaluator<Product<Lhs, Rhs, LazyProduct>, ProductTag, DenseShape,
       
     SameType = is_same<typename LhsNestedCleaned::Scalar,typename RhsNestedCleaned::Scalar>::value,
 
-    CanVectorizeRhs = bool(RhsRowMajor) && (RhsFlags & PacketAccessBit),
-    CanVectorizeLhs = (!LhsRowMajor) && (LhsFlags & PacketAccessBit),
+    CanVectorizeRhs = bool(RhsRowMajor) && (RhsFlags & PacketAccessBit) && (ColsAtCompileTime!=1),
+    CanVectorizeLhs = (!LhsRowMajor) && (LhsFlags & PacketAccessBit) && (RowsAtCompileTime!=1),
 
     EvalToRowMajor = (MaxRowsAtCompileTime==1&&MaxColsAtCompileTime!=1) ? 1
                     : (MaxColsAtCompileTime==1&&MaxRowsAtCompileTime!=1) ? 0
-- 
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